Yes, you soon find the MOT's not worth the paper it's written on. Some of the JNA ones seem to have been in pretty poor shape (which is why i didn't buy one).
As you say, Germany's the place to be for parts, with The Netherlands a close second and perhaps Italy.
There's still no word of where the lorry loads of spares purchased at the same auction (in Serbia or Croatia) ended up, but I assume with one of the established dealers.